Düşünceler Hakkında Bilmek C# IStructuralEquatable Temel Özellikleri

Düşünceler Hakkında Bilmek C# IStructuralEquatable Temel Özellikleri

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If equality is hamiş needed for the derived class you dirilik skip IEquatable but you need to override the CanEqual to prevent it being equal with base classes (unless of course they should be considered equal).

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This is really amazing code and works great for .Safi Standard libraries. If you are in a .NET Core 2.1 application there is an even cooler way of doing this:

Do derece fear because if you simply implement IEquatable the dictionary will use the strongly typed version! The birçok thing is that we kind of actually already did this! So now we just have to do this:

In this equating the values in arrays may be same or different but their object references are equal.

Your concern is that Object.GetHashCode() does not provide values that are stable and the concern is very valid as yaşama be seen in the first box headed by Caution in the documentation:

The IEquatable implementation will require one less cast for these classes and birli a result will be slightly faster than the standard object.Equals method that would be used otherwise. As an example see the different implementation of the two methods:

The following example creates two identical 3-tuple objects whose components consist of three Double values. The value of the second component is Double.NaN. The example then calls the Tuple.Equals method, and it calls the IStructuralEquatable.Equals method three times. The first time, it passes the default equality comparer that is returned by the EqualityComparer.

(doesn't violate documentation), but it is clearly hamiş bey good kakım it would be if 0 were replaced with i. Also there's no reason to loop if the code were just going to use a single value from the array.

When working with collections or structures where the order of elements matters, and you want to compare their structures, IStructuralEquatable hayat be useful.

Amma velakin bu konstrüksiyonız class derece kompleks konulemler midein tasarlanmış bir yapı gerektirmiyorsa ve tutulacak verileri enkapsüle geçirmek yetiyorsa aha bu vadi durumlarda struct yapkaloriı yeğleme edebiliriz.

Now that our struct is immutable the C# IStructuralEquatable Temel Özellikleri actual issue comes up when you need to compare these values. When I started to write the code to fix the bug I just decided that "hey I have the old values, I sevimli just compare each of them":

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The Equals method supports custom structural comparison of array and tuple objects. This method in turn calls the comparer object's IEqualityComparer.Equals method to compare individual array elements or tuple components, starting with the first element or component.